Printing press



' July 6,1926; 4

c. w. HARRoLp ET AL PRINTING PRESS Filed April 4, 19212 a Sheets-She et i C zar/es ray/1333? OZ Cer les a: d/(git W July 6,1926. 1,591,121

(3. w. HARROLD E T 1.

PRINTING PRESS Filed April 4, 1922 8 s'heets sheet 5 a bot 0% [as Ii 'chZQmI/Wgi July 6-, 19 26. 1,591,127

c. w. HARRQLD ET AL Carles 1K flarmlfl! Mal-(es I nydf.

nomtoz I 1 13591327 c. w. HARROLD ET PRINTING PRESS Filed April 4, 1922 BSfie'bs-Sheei is,

.Mn i 1/13. a

Patented uly 6, 1926..

, 1,591,121 PATENT oFFlcE. v

CHARLES W. HARROLD AND CHARLES J'. WRIGHT, 0F CLEVELAND, CHIC, ASSIGNORS TO THE HARRIS AUTOMATIC PRESS COMPANY, OF CLEVELAND, OHIO, A CORPORA- TION 0F 01110.

Application filed April 4,

Our invention relates to multi-cylinder, 'multi-color printing-presses particularly to planographic or off-set machines, in which the same side of the sheet of paper or stock receives successive impressions from the respective cylinders'carrying the separate colors. We have embodied our improvements in a two-color off-set press as shown and hereafter described, but our invention is not to be limited to such type of press.

The primary object of our invention is, among other things, to provide a'simplified press of this type with an improved manual or automatic-sequential tripping mechanism, so that the tripping on the first printing couple for the first ,color will automatically control the timing of the trip on the other printing couples for the other colors but so delaying the action of the successive throw ofls until the particular sheet-on the several;

printing units is fully printed withall the colors, combined with means for restoring the impression in the successive printing units in like-sequence, and without spoiling any sheet that maybe on the press in the separate printing couples.

A further object in the present embodiment is to provide an improved and compact arrangement of cylinders for the two sets of printing couples together with an intermediate transfer-cylinder to pass the sheets from the first set to the second, whereby the form-cylinder in each set is arranged at right angles to its blanket and impression;

cylinders, with each set tilted at adifferent angle from the base line of the press to secure proper spacing between the different form and blanket cylinders and also affording convenient access to the various control and actuating 'mechanisms,- while economizing. in head-room which has distinct advantages in multi-color cylinder presses of this type for the pressro'om of the usual height.

A further object of our invention is to provide an improved mechanism for the two impression cylinders, the intermediate coacting transfer-cylinder, and the deliverycylinder in operative relation with the second impression-cylinder, by which adjustments of the relative positions of these cylinders to one another may be made to ac commodate for .printing sheets of varying thickness, with a simultaneous adjustment of the transfer-cylinder in relation to the two.

impression-cylinders combined with a gradrnmrme :enns's. i

1922. Serial No, 549,429.

uated scale device for controlling, as well as lndlcatin the amount of adjustments of each of t ese cylinders in relation notonly to each other but. also to the other coactby a -feeder trip, by which the, throw-off on the secondunit is so delayed that the two sheets which are in the machine at the time of the initial tripping inthe first unit, are carr1ed completely through the press and printed, before the second throw-off acts, thereby avoiding spoiling anysheet that is in the machine.

A further object of our invention is to provlde in connection with the sequential throw-offs for the cylinders of the two units improved mechanism for throwing off the inking form rolls for the form-cylinders of both units so timed in relation to the sequential impression throw-offs as to lift such form-rolls when they are passing over the openings in their respective cylinders so that no portion of the plate will be double inked.

A further object resides in avoiding stopp ng the press during these sequential tripplngs for the different cylinders and also the form-rolls in the two sets of printing" couples at predetermined points in these respective cycles. By our invention the stop- .plng-of the press is unnecessary whichsaves time in restarting and avoids much loss in production.

Our improved press also presents other features of novelty-and usefulness whereby the press is rendered better adapted and more convenient for use in multi-color offset printing, all of which will be hereinafterset forth and claimed.

The accompanying drawings show a preferred embodiment of our invention in a twocolor ofi'set press which is not necessarily restricted to any particular form or type of printing-press construction.

Of the drawings, Fig. 1 is a diagrammatic side elevation of a two couple off-set press. I

adapted for printing twice upon the same side of the sheet. In this figure certain parts shown in other views in detail are omitted,

and the various cylinders and form 'rolls are in normal position with the impression' ong,

another, to accommodate sheets of various thickness;

Fig. 3 is an enlarged detail view showing -the.throw-oif mechanism for the first color printing unit, with the trip mechanism to control the operation of the throw-off mechanism, and a portion of the link which connects the throw-off devices for the first unit with the latch in the relay mechanism controlling the operation of the throw-01f mechanism for the second color printing unit.

Fig. 4 is an enlarged fragmentary sectional view partly in elevation, showlng a form of sheet-controlled trip mechanism' which may be used for the throw-off for the first color printing unit;

Fig. 5 is an enlarged detail View showing the throw-off for the first color printing unit set for operation, the mechanism therefor being positioned by the sheet-trip mechanism or manually by the operator;

Fig. 6 is a view similar to Fig.3 showing the blanket-cylinder of the first color unit separated from its impression-cylinder which action sets the latch to throw-off the impression in the second color unit;

Fig. 7 is an enlarged detail yiew showing the latch in the relay mechanism .for the throw-oft mechanism for the second. color printing unit, the parts being in normal position with the impression on;

Fig. 8 is a detail view showing the latch for controlling the operation of-the throwoif mechanism for the second color printing unit, this view showing the latch while idling;

Fig. 9 is a detail view showing the camplate for moving the pawl of the latch shown in Fig. 8, as moved into position to lift this latch pawl into alinement with the pin on the releasable catch normally preventing the throw-ofi mechanism from shifting into operative position for engagement with an actu-- atin'g element to throw-off the impression for .the second color printing couple; this camplate is moved into the position shown by a link connected with the throw-01f mechanism for the first color printing unit;

- Fig. 10 is an enlarged detail view showing the throw-off mechanism for the second color printing unit about to be positioned to operate the compound toggle devices to move the blanket cylinder of this second unit away from its coacting form and impression cylinders; in this figure the latch pawl frame, or carrier, is shown as having been actuated by its cam-plate to release the catch which allows the throw-off mechanism for the second color unit to come into operative position;

Fig. 11 is an enlarged View showing a position for the throw-off mechanism of the second blanket-cylinder and its connection with said cylinder together with the inker throw-off mechanism;

Fig. 12 is an enlarged detail view showing the throw-off mechanism for the second blanket-cylinder as having been operated upon by its actuating cam on the second impression-cylinder.

Figs. 13-to 16 inclusive are enlarged detail views showing the structure and relation of the different parts comprising the control ling latch relay mechanism for the throw-off mechanism for the second color printing unit; and

Fi 17 is an enlarged detail face view equal diameter comprising the two printing units each comprising an off-set printing set of three cylinders, the first unit passing the successive sheets to the second unit by a transfer cylinder intermediate the two im pression eylinders, and the second impression cylin er coactingwith a delivery-cylinder to carry the sheets to any suitable delivery mechanism. The form-cylinder 19 of the first unit is mounted on the shaft 20 journalled in the frame 18, the cylinder 19 coacting with the blanket-cylinder 21 which coacts with the impression-cylinder 22, these twocylinders being mounted on the shafts 23 and 2a respectively. The second color unit comprises the form-cylinder 25, the blanket-cylinder 26 and the impression-cylinder 27 all mounted on the shafts 28, 29 and 30 respectively which are suitably journalled in the frame 18. Between the two impression-cylinders 22 and 27 is the transfer-cylinder 31 mounted on the shaft 32 and adapted to carry the successive sheets from the cylinder 22 to the cylinder 27 Below the impression-cylinder 27 is the delivery-cylinder 33 mounted on the shaft 34 by which the printed sheets are taken from the cylinder 27 and transferred (not shown).

The arrangement ofthe separate sets of cylinders in the two units is such that the form-cylinder 19 is disposed at right angles to the blanket-cylinder 21 and impressioncylinder 22, and-in like manner the formto a delivery mechanism 1 cylinder 25 of the second unit is arranged in the frame 18 between the two form-cylinders 19 and 25 from which he'may'conveniently regulate the ink and water' fountains for the two form-cylinders from the same position, while also having access to the.

blanket-cylinder 21 to touch up or sponge 01f same according to requirements, while the blanket-cylinder 26 may also be. conveniently reached from the floor for similar manipulationsat the left end of the press as shown in Fig. 1. Again the arrangement of the eight cylindersin the frame 18 relatively to eachother to constitute the twocolor ofi-set press shown I in the, drawings affords a maximum accessibility to the cylin-f -Fi 1. Power is derived from any suitab e source which is connected tofthe cyl- 1nder gears by a compound gear tram. Since these are common forms of printing-press construction and arewell-known 1n the art,

they are not shown in detail in the drawings. The shaft 23 carrying the blanket-cylinder 21 is mounted at both ends in the eccentric bearings 35 which in turn are mounted in the journals 36 afiixed to the frame '18; in

' like manner the shaft 29 carrying the second blanket-cylinder 26 is mounted in eccentric bearings 37 carried by journals 38. 'The shaft 24 for the firstimpression-cylinder 22 is mounted at both ends in eccentric bearings 39 secured in-journal's 40; also the shaft 30 for the second impression-cylinder 27, is-

. mounted in eccentric bearings 41 secured in journals 42. Theshaft 32 for the intermediate transfer-cylinder 31 is in like manner mounted-at both ends in eccentric bearings 43 secured in ournals 44 affixed to the frame 18, and the shaft 34 of the delivery-cylinder 33 is alsomounted at both ends in. eccentric secured bearings 45 secured in journals 46 totheframe18. a

The inking mechanisms for the two formcylinders 19 and 25 are duplicates in construction and operation, and only one set of such inking rolls with means toraise same from the respective form-cylinders is shown in connection with the second form cylinder 25, the inking mechanism for the first form-cylinder 19 not being shown: The inking rolls 47 are mounted on transverse shafts 48 carried in slotted bearings (not' shown) in the frame 18. The end-of each shaft 48 forms a cylindrical bearing adapted to be engaged by rollers 49 mounted on two.

rock-arms 50 and 51 pivotally secured, to i studs 52and 53 respectively. The. inner ends of the arms 50 and 51 are operatively connected by links 54 and 55 respectively to the bell-lever 56 pinned at 57 to the frame, 18. I The arm 58 of the lever 56 is connected by the link 59 to the inker throw-off mechanism hereinafter to. be more particularly described. WVhen the link 59 is lowered the .inking rolls 47 are lifted from their respective form-cylinders 19 and 25,.and when the link 59 is raised such inking rolls 47 are re.-

bstored into contact with the form cylinders 19 and 25.

The automatic throw-oft and throw-on mechanisms for' the two blanket-cylinders 21 and 26 are identical in 'construction and operation to secure the sequential tripping ofthe two printing color unitsand are best shown in Figs. 3, 5 a'nd'6, and it will only be necessary to describe the detailed structure and operation of one of these mechanisms, whereby tlie f' blanket-cylinder is moved from "and to both itsform and impression -cylinders, actuated either manually Qr'FautomaticaHy by the feeder trip controlled by: the interruption or absence of stock in the feed supply. Referring to Fig. 3, the impression-cylinder shafts 24 and 30 carry the cam 60 which engages the roller 61 ion the lever arm 62 pivoted on the stud 63in thebracket64 secured to the frame 18. The lug 65 on the lever-arm 62 slidably carries the rod 66;.about which is coiled the spring 67; which acts to hold the rolle 61 in engagement with theperiphery of the cam 60. The lower end of the rod 66 is pivotally secured to the bracket 64 by the pin 68. Thelever-arm' '62 also carries the-depending bracket 69 which is pivotally connected by the link 7 O to the depending arm 71" -project-M ing downwardly from the bell-crank lever 72 pivoted to the stud 63. The .arm 71 also carries the lug 73 through which the rod 74 slidably passesiwith its inner end pivotally secured-to the1pin'68 with the spring 75 coiled abOut-g-the. rod ;-74 normally to hold the. arm 71f"under tension in the position shownin Fig. 3.-' Thebracket 69 slidably supports therod 76 with "itslower. end 77 ';pro ectingyjbelow the bracket 69, the length of this'end' I -77 being regulated. by adjusting n t 7.8: is the rock-arm 80 carrying the shoulder 81 faced with ahardened plate and adapted to be-engaged .bythe rod-end 77 as shownin Fig. 6.- Adjacent the stud 7 9'is the stud82 uponiwhicheis pivotally mounted the bell- .crank-le'ver 83 which carries the shoulder 84 of. similar construction and function. as the shoulder 81, Fig. 3 showing the should'er 84 in operative aline inent with the rodend 77 after havingbeen engaged thereby; The lower arin'85 of the lever 83 is connected-by the link -86 to the arm 80. The

ivotally secured to the stud 79 85 as they are rocked on their respective.

studs 79 and 82 are maintained in substantial parallelism ,by the link 86. The toggle link 91 is pivotally secured to the bell-lever 93 mounted on the stub-shaft 94 affixed to the frame 18 and the arm. 95 of the lever 93 is pinned at 96 to the toggle lever 97 which is pivotally secured to the arm 98 affixed to the eccentric bearings and 37 of the two blanket-cylinders 21 and 26. The adjust:

. able screw-bolt 99 in the lever 97 regulates 0 its length to control the throw of such eccentric hearings in the proper operation'ofthe toggle 95, 97.

When the rod-end 77. is shifted to the right as shown in Fig. 5, and then pressed 2 down on the shoulder 81-bythe cam 60, as

connected with the arm 98 carried by the shown in Fig. 6, the arm 80 is swun in an anti-clockwise direction which stralghtens the. toggle levers 90 and 91 and simultaneously breaks the toggle'levers 95 and 97 eccentric bearings 35'and 37 to throw-ofi the impression by-separating the blanket-cylinder from both its form and impression cylinders as shown in Fig. 6. The impression 39/ is restored when the rod-end 7 7' is swung to the left by the spring75 and pressed down thereafteron the shoulder 84 by the action of-the cam to swing the arm 85 in an anti-clockwise direction to break the toggle levers 90 and 91-and straighten the toggle levers 95 and 97 thereby moving the eccen tric bearings 35 and 3'1. to restore the blanket-cylinders 21 and 26 to printing relation, as shown in Figs. "3-and 5.

Automatic means are provided. to raise the inking rolls 47 from their respective form-cylinders 19 and 25 in predetermined sequence with the throwing off of the impression by separating the blanket cylinders from both their respective form and impression cylinders. preferably actuated when the inking rolls 47 are. about to pass over the opening in the form or plate cylinders after the impression is thrown off which may advantageously occur at a fixed point when the gaps of the several cylinders in each unit (form, blanket and impression) are adjacent one another.

- The improved mechanisms for lowering the rod 59 to throw-ofi' the inking rolls 47 is the same in both units, and only one set will be described. Such mechanism is best shown in Figs. 1, 3, 5, 6, 11, and 17: Referring moreparticularly to Figs. 3, 5 and 6, the impression-cylinder shafts 24 and 30 Such. inker throw-off 'is" carry the cam 100 which may be adjustably mounted (by means not shown) on the' two shafts so that the action of this cam 100 may be variably adjusted in predetermined se quence to the action of the impression throwoff cam 60 to alter the respective timings of the twothrow-ofi's in each unit as may. be desired. In the embodiment shown, this inker throw-off cam-100 does not operate until about two-thirds of a rotation of the impression cylinders after the impression has been tripped-by the cam 60, as shown in Fig. 6. Mountedfon the stubrshaft 101 is the rock-lever 102 carrying the cam-roller 103 pivoted on the pin 104, the roller 103 being adapted to be engaged by the cam 100 at predetermined points in the cycle when the lever 102 is rocked .to bring the roller 103 into the path of such cam. Pivotally secured to the pin 96 is the arm 105 having formed'in its extremity the recessed shoulder 106 which rests on thepin 104. The under side of the arm 105 has the cam-recess 106 out therein which rides over the roller 107 journalled in the stud 108 .secured'to the frame 18 when the toggle levers 95 and 97 are straightened in the position shown in Figs. 3 and '5. WVhen this toggle is broken as shown in Fig. 6, the arm 105 rocks the lever 102-on its stub-shaft 101 in an anticlockwise direction and pushes the cam-roller 103 into the dotted line position'shown in Fig. 6, the arm 105 being raised out of engagementwith the pm 104 by its sliding out of the cam-recess 106 over the roller 107 thereby releasing rock-lever 102 from operative engagement with the arm 105. Referring to Figs. 11 and 17 the arm 1090f the rock-lever 102 forms a toggle with the toggle link 110 pinned together by the pin 111.

The link 110 is pivotally secured to the rock-arm 112 rotatably mounted on the sleeve -113' journalled on the stub shaft 114 affixed to the frame 18; also affixed tot-he sleeve- 113 is the ratchet 115 the teeth of which are adapted to be engaged by the pawl 116pivotally secured to the rock-arm 112. Journaled-on the sleeve 113 is the bracket 117 carrying at either end the oppositely-disposed pawls 118 and 119 to engage the ratchet 115" as shownin Fig. 17. Also afiixed to the sleeve 113 is the rock-arm 120 pivotally secured to the rod 59 and the hand-lever121 is alsosecured to this sleeve 113 as shown in Figs. land 7. The pawls 116, 118 and 119 are each held in engagement with the ratchet115 by springs 112, 123 and 124 respectively mounted on supporting studs 125, 126 and 127 to bear on pins 128, 129 and 130 respectively as shown in Fig. 17. When the toggle levers 109, 110 are broken in the direction as shown in dotted lines in Fig. 17, the pawl 116 is lowered into engagement with a tooth in the ratchet 115; thereafter when the cam revolves to the dotted line position shown in Fig. 6 the rocklever 102 is moved from its dotted line position to the full line position shown in Fig. 6, because the arm 105 has been theretofore lifted and released from the pin 104 as 'hereinbefore described. 'This oscillation of the rock-lever 102 by the action of the cam' 100 again 'straightens the toggle levers 109,

.110 which in turn swing the pawl 116 in enpawl 118 to throw-off theinkers, while an opposite downward movement of thishandlever 121 will cause the pawl 119 to engage the .ratchet 115 torotate the latter in a clockwisedirection to restore theinking-rolls 47 to operative contact with the form-cylinders 19 and 25'. By these devices the inkers may be thrown off either manually or. automatically and in timed sequence with the impression throw-off in each printing unit through the continued movement of the press, while the separate inkers are restored to operative relation by the manual means after the impression has been restored.

In order that the impression throw-01f mechanism in the-first printing unit, fthereafter sequentially tripping its inker throwofi, may beg automatically actuated in case of the failure of the feed of a. sheet to t'he press,-the following mechanism has-been devised for such purpose: vThe'feed table -131yis securedto the frame18 in any suit- 40 fable manner, over which table the sheets are successively advanced to the impressioncylinder 22 as shown in Figs. 3 and 5. Ex-

tending transversely in the frame 18 is the spring-impelled throw-off shaft 132 which is oscillated by'the spring 133 coiled about this shift the inner end-being pinned to the collar134 secui e dto the shaft 132 as shown a in, Fig. 4. The shaft 132 carries'the arm 50' 135 connected by the link 136to the rocklever 137 fjournalled infthe stub-shaft 138 secured to the frame 18. The rock-lever 137 has the rod. 139 .pivota lly secured thereto,

.the lower endq or this rod slidably mounted in the lug 140- aflixedto the arm 72. Coiled about the rod .139 and between the lug 140 and the adjusting'nuts 141flscrew-threaded.

on-the rod 139 coil spring 142 normally tending to push the'rod 139 upwardlly in the direction shown by the arrow in 1 31 under the force of the spring 133 (aided somewhat by the spring 142)- in a. clockwise direction the link 136 is depressed to shift the rock-lever 137 to the position shown in Fig. 5to's'wing the arm 72 about the stud 63 trip mechanism on the feeder:

.table 132 supports the stock148 that is be-.

When the shaft 132 is oscillated whereby the positions of the bracket 69 and rod-end 77 are moved from. the positions shown in Fig.3 to those shown in Fig. 5

thereafter to operate the impression throwoff devices of the first printin unit heretofore described to throw the bla I der21 ofi' impression. The'hand-lever' 143 is operatively connected to the shaft 132 either to' throw-01f the impression or to throw-on the impressionand reset the latchtri mechanism ,now to be described.

nket-cyline shaft 132 is held 'in the position shown in'Fig. 3 by the latch 144 pivoted on the shaft 145 journalled in the frame 18 and extending'across the feed-table 131 as shown in Fig. 4, The latch 144 engages with the notch 146 out in the collar 147 secured to the shaft 132. Preferably this latch 144 is released automatically through The feed i'ng' fed to the press. Extending transversely above the feed-table1'31 and'jour-. -n'alled inuprights atthe sides thereof is the shaft 149 which carries the arm "150 '(Figs. 3 and 5) connected by the rod 151 to the impression-cylinder shaft 24 b means of the pin 152 so as. to impart to't e shaft 149 an oscillating movement. 153, 153 are spacedapart grooved collars rigidly secured to the shaft 149. Adjacent each collar 153 is the disk 154 aflixed to the inner end of the tubular shaft 155 which is loosely sleeved on, and encloses a portion'of, the shaft 149, as shown in Fig. 4. .The tubular shaft 155 carries the arm 156 having a projecting lug 157 which engageswith the arm 158secured to the shaft 145. The trip-lever 159 is pivsides of the grooved collars 153 so that its longer and heavierarm is held from falling into the aperture 161 out in the topof the feed table 131, by the interposition of the stock 148 as shown in Figs. 3 and 4. The opposite end of the trip-lever159. is.T-

shaped to form the laterally extending tooth 162; in the peripheries of the collars 153- and also of the disk 154 are formed cut-outs 163 and 164' respectively. Ordinarily the tooth 162 rests against, or is'in proximity to, the periphery of the disk 154;- it canengage with ,the cut-out 163 of the collars otally secured at 160 between the parallel 153 only when it can fall into the cut-out 1640f the disk 154. When this occurs the disk 154 with its tubular shaft 155, which is normally at rest, are locked to and turn with the oscillating shaft 149 as shown in Fi 5. The entrance of this tooth 162 into I looking engagement 'with the-disk154 will occur upon the failure or interruption in the feed supply. When the stock 148 isin proper pos tion, as shown in Figs. 3 and4, the curved longer arm of the trip-lever 159 will engage therewith and will be prevented from lowering into the 'aperture ;161, and

from turning sufficiently to interlock with the disk 154. If the stock 148 should, at

any time, be interrupted or absent, the

longer arm of the trip-lever 159 will fall of its own: weight into the aperture 161, thereby causing the tooth 162 to interlock. with the "cut-out 164' in the disk 154. Thus the tubular shaft 155 will be caused to oscillate with the shaft 149 to release the latch 144' engaging the notch 146 in the collar 147 on the shaft 132. Through this movement of thisherein described mechanism, the shaft,

' 132 is partially rotated by the spring 133 in a clockwise direction as shown b rows in Figs. 3 and 5 to throw-o [the impression by separating the blanket-cylinder ket-cylinder 26 in the second unit, and also the inker throw-off of such second printing unitin predetermined sequence with the re.- spective throw-ofls for the first printing unit, controlled, but not operated, by the impressionxthrow-oif mechanism of the first printing unit: Refer-ring particularly to Figs. 7, 8,9 and 10, we have devised a latch relay mechanism for the impression throwoff of the second printing unit which is described as follows: The stub-shaft 165 is secured'to the frame 18 and has sleeved thereon' the tubular bracket 166 arranged between.

the oscillated collar 167 and the washer 168 held-in place by the pinv 169 as shown in The upper arm 172 ofthe lever 171 carries the cam-roller 173 journalled on the pin 174 passing through the sleeve 175 affixed to the lever-arm 172 and is disposed in the path of the cam mounted on the impression-cylinder shaft 30 as shownin Fig. 10. The lower arm 1760f the lever 171 carries the adjustable pin 177 adapted to engage the stop 178 mounted on the stub-shaft 179 affixed to the frame 18, as shown in Fig. 14. The pin 174 has pivotally secured thereto the latch 180 extending rearwardly or to the right as shown in Figs. 9, 10 and 13, with a-conca-ve end 181 adapted to engage with the pin'182 projecting laterally from the upright catch arm 183 mounted'on the collar 184 journalled on theshaft 179. The arm 183 has a notch 185 formed therein adapted to rest on the lug 186 projecting from the block 187 on the bracket 166 when the catch arm collar 167 is the cam-plate 188 which is os-' cillated by the rock-arm 189 secured to the under side of the collar v167 The arm 189 the ar-- on its upper end the short shaft 193. The

inner end of the shaft 193 ca. ies the swinging pawl 194 having the pin 1% projecting inwardlyfrorn this pawl to ride over the cam-plate'188; the latch 180 is held in en'- gagement in the pin 195 by the coil-spring 196 between the arm 172 and latch 180. The outer end of the shaft 193 pivotally carries the rod 197 the lower end of whiclt i slidably mounted in the lug 198 on the end of the arm 72 as shown inFigs. 7 and 10. -Coiled about the rod 197 mid between the lug 198 and the adjusting nuts 199 screw-threaded on the rod 197 is the coil spring 200 which normally tends to push the.

rod 197 upwardly and to the left in Fig. 10, but is held from this movement by the catch-arm 183 resting on the lug 186 as shown in Fig. 13. The spring 201 connects the catch-arm 183 with the lug 202 on the rock-arm 17 6 to hold the former in engagement with the lug 186 as well as hold the rock-lever 171 so that the pin ].77- is in engagement with the stop 17 8 with the cantroller 173 projectingto the left in the path of the cam 60 as shown in Figs. 7 and 9. The cam-roller 173 is engaged by the cam 60 in each cycle as shown in Figs. 8 and 10 thereby oscillating the rock-lever 171 in a clockwise direction .to inaugurate the action of the impression throw-off mechanism of the second unit, but only when the rod 190 has been pushed to the left (Fig. 10). When the rock-arm 189 is in the position shown in Fig. 8, latch relay mechanism is idling with the latch.180 dropping over the pin 195 and below and out of range of the pin 1.82 on the catch-arm 183. However when the arm 189 has been shifted by the rod 190 to the positions shown in Figs. 9. and 10, the cam-plate .188 simultaneously raises the pawl 194 and its pin 195 lifts the latch 180 so that its end 181 will engage the pin 182 on the catch 183, when the cam 60 thereafter engages the cam-roller 173 to force the latch 180 to the right as indicated by the arrows in Fig. 10. 183 is thus forced off the lug 186 on the block 187, the bracket 166 is free to oscil late in an anti-clockwise direction on the shaft 165 by the action of the coil-spring 7 5, which shifts the impression throw-off mechanism to the dotted line position shown in Fig. 10 with the rod-end 77 swung to the right as indicated by the arrow ina position to depress the shoulder 81 when the cam 60 has thereafter revolved to act thereon by engaging the cam-roller 61 to actuate Nhen the catch the throw-ofi' mechanisms to separate the blanket-cylinder 26 from both cylinders 25 and 27, adjudicated by the arrows in Fig.

11, the dotted lineshowing the positionof the cylinder 26 when the impression is on, while the dash and dot line. shows the cylinder- 26 separated or oil impression.

The impression is automatically restored in the second unit by the movement of the rod 190 to the right which shifts the camplate 188 back to its normal left position thereby lowering the nose ofthe pawl 194 into the path of the lug 17 2* onthe arm 172. At the next actuation of the cam-roller 173 by the cam 60, the bracket 166 will be rocked so as to force the rod 197 downwardly to "position the impression throw-off mechanism as shown in Fig. 7, and also to lower the lug 186 to reset the catch183.

Means are provided for separately adjusting the position of the two impression cylinders 22 and 27 with relation to their respective blanket-cylinders 21 and 26,' and also the relation of the transfer-cylinder 31 with respect to the two impression-cylinders 22 and 27 to variably adjust their relative positions so -as to accommoda'te' stock of varying thickness, all while the'press is in operation. Such means are each preferably combined with a graduated scale to serve' as an accurate indicator to enable the sepa rate adjustmentsto be uniform throughout according to the thickness of the particular stock that is being "fedto the press. The

mechanism for accomplishing this feature.

' of our improvement is. shown in Fig. 1 and -of the bracket-205 is formed with journal ,ment for one cylinder will suffice.

partly in detail in Fig. 2. As such devices are the same for all three cylinders" 22, 27 and 31, a single description of'the attach- Referring to Fig. 2 the eccentric bearing 39 of the impression-cylinder 22 (for example) carries the arm 203 to which is pivoted the rod 204adjustably secured to the bracket 205 by the adjusting units 206. The lower end 207 to contain the eccentric bearing 208- mounted on the stub-shaft 209 secured to handle 214. The lug 211' aduated scale 215 arranged in 'proximityi the frame 18. The eccentric bearing 208 is moved on the shaft 209 within-the journal 207 to swing the bracket 205 by the arm 210 secured to such bearing 208'; the arm 210 carries the: screw-threaded lug 211 engaged by .the screw-threaded. micrometer, rod 212 rotatably supported by the bracket'213 securedto the frame 18, and actuated by the also carries a to the tip of the micrometer rod-212 to indicate the extent of the adjustment. The

.,- screw bolt 216 maintains therod 212 in any predetermined position in thclug 211 after adjustment. When the arm 210 israised or lowered by the rotation of the rod 212, the" eccentric bearing 39 is slightly shifted so of thecam 60 while Fig.

that the-position of-the cylinder 22 with relation to the blanket-cylinder 21 is I changed to properly accommodate the thicknessof the stock to be fed to the press.

For example,'if the press has been set for '.040 inch cardboard, and it is afterwards journalled in the stub-shaft 218 to raise or lower the rod 204 as heretofore described.

The bolt 219 with wing-nut 220 extending ings- 45 for this cylinder by a slotted lever 21 through the slot 221 in the lever 217 locks v the latter in anydesired position. No micrometer attachment is necessary for. this delivery-cylinder 33, as a close and accurate adjustment is unnecessary in taking the printed stock from the cylinder 27..) The operation of the hereinbeforede second impressionscribed mechanism in the two-color off-set press shown in drawings as a preferred emodiment is substantially as follows: When,

ever the stock 148 is interrupted or is absent from the feed-table 131, the trip-lever 159 acts to release the spring-impelled shaft 132 so that the rock-lever .137 is shiftedfrom the position shown in Fig. 3 to that shown in Fig. 5, the rod 139 being moved in the direction of the arrow in Fig. 3. This movement shiftsthe bracket'69 and rod-end 77 so that the lattenwill engage the shoulder 81 when depressed by the cam 60 carried by the impression-dylinder shaft 24. Fig. 3 shows the cam-roller 61 about to ride on the high part 6 shows the rodend 77 as having swung the arm 80' to operatethe toggles 90,91 and 9.5,.97 to shift the eccentriebearlnfgs' 35 to separate the blanket-cylinder 21 rom both its form-cylinder 19 and impression-cylinder 22.- As the toggle levers 95 and-97 are being broken,

the arm 105 rocks the lever 102 tobring the cam roller 103 into the path of the formroll cam 100 to throw-off the inking rolls 47 by the intermediate mechanism heretofore described. In like manner when the toggles 90, 91 are straightened as shown in Fig. 6, the rod 190 is thereby forced to the left as indicated by the arrows in Figs. 9' and 10, to actuate heretofore described to release the catcharm' 183 to allow the rod 197 to be moved to' the left by the-spring 75 in the second printing u-nit after the cam-roller 173 has the latch relay devices been moved to-the right from the position shown, in Fig. 7 to that shown in Figs; 8V

and 10 by the cam 60 to shift the rod-end 77 from the full line'position shown in Fig- 10 to the dotted line position indicated by the arrow so that the earn-60 on'completing its revolution as shown in Figs. 11 and 12 may-depress the cam-roller 61 to separate the blanket-cylinder 26 from both its formcylinder and impression-cylinder 27, the toggle-levers 95 and 97 in being broken from Fig. 11 to Fig. 12 moving the arm 105 in the second unit to position the inkerthrow-01f devices by bringing the cam-roller 103 intio the pathof the cam 100 on the impr'ession-cylinder shaft 30V to operate this inker throw-ofi? in timed sequence with the impression throw-oil as in the first printing with the impression on, the latch pawl 144 is held in the notch 146 by the constant downward pull exerted on the arm 135 by the springs 67 and 75. When the operator presses down on the hand lever 143' to relieve the pressure of the notch 146 in the collar 147 on the latch pawl 144, the weight of the depending arm l58 which hangs at an angle from the vertical (Fig. 3) willswing the pawl 144' to the right and thereby clears the notch 146, so as to allow the spring-impelled shaft 132 to oscillate to;'

throw off the impression when the operator lets go of the hand lever 143. The throwoff timings of the two units areso delayed,

one with the other, that each of the two sheets which are in the machine at the time of the initial tripping in the first unit is car: ried completely through the press and printed, the throw-ofis in the second unit not acting until the sheet in thefirst unit has passed through the second unit, thereby pie venting any sheet already properly fed to and in the press from being spoiled,-all of which throw-offs will advantageously occur while the press is' in operation.-

In like manner the impression for the two units may be restored in like sequence. in

the continued operation of the press, after the hand-lever 143 resets the latch 144 and shifts the rock-leverl37 in-the first'unit to sequential tripping throughout both units. As shown in Fig. 3

swing the rod-end 77 upwardly in Fig. 3

so as to coact with the shoulder 84 to allow the cam 60 to operate the toggles 90, 91 and 95, 97 to restore impression, the breaking of the toggle 90, 91 simultaneously moving the rod 190 to the right to bring the latch relay mechanism to the position shown in Fig. 7.

This movement permits the cam -60 of the second unit to restore the impression in this unit in the same manner as heretofore described forthe second unit. The inkingrolls 47 of the two units are restored to oper-- vative position on the form-cylinders19 and 25 by raisingfthe' hand-levers 121 Which straightens the toggles 109, 110 and rocks the lovers 102 to carry the cam-rollers 103 outof the path of the cams 100. whereby the pins 104 againengage the shoulders 106 of the arms 105.

The foregoing constructions embody the principles ofour invention as applied to a two-color ofi'set printing-press, but our invention 18 also applicable to other forms of printing-presses and printing more than two colors and other embodiments and modes of operation maybe made. However the foregoing is sufficient to disclose the underlying principles and advantages involved.

lVe claim as our invention i 1. In amulticolor press, a plurality of printing couples each havin independent normally inoperative means Tor separating the couple, and a. normally disconnected latch relay mechanism positively controlled and simultaneously actuated by the tripping movement of one of said couple separating means for placing in operative position at a predetermined point in the cycle another of said separating means.

2. In a multicolor press, a plurality of printing couples each having independent normally inoperative means for separating the couple, and means positively controlled and directly actuated by the tripping movement of one of said couple separating means for simultaneously positioning a part of an adjacent couple-separatingmeans for subse quent actuation at a predetermined point in the cycle.

3. In a multicolor press, a plurality of printing couples each having independent normally. inoperative means for separating the couple, and means positively controlled and directly and simultaneously actuated by the tripping movement of one of said couple separating means for simultaneously positioning a part of an adjacent couple separating means for subsequent actuation at a predetermined point in the cycle operable through continued movement of the press.

4. In a multicolor press, a plurality of printing couples, normally inoperative means for throwing ofi' impression for the first couple, independent normally inoperative means for throwing off impression for angi other couple, and timing means positively; controlled and directly actuated by the tripa j for another.couple,: and'timing means com}v "prising allatch relay mechanism positively controlled and directly actuated by the tripping. movement of. said-first impression throw-oil means for simultaneously positiom 1 ing a part of said otherimpre'ssionthrow-f tiv'e means forxthrowing'ofiimpression for;

- and directly actuated by the tripping movement of said first impressionthrow ofi means tive position to be directly actuated in predirectly actuated in ping "movement-of --said;'first: impression by an element 'carri'e .5. p In tive .means for throvvingf'ofi" impression for 'the first couple," independent normally inopi erative means forithrowing? ofl' impression .ofi means in operative position to be directly actuated in predetermlned. sequence by an elementcarried by one of the pr1nting'memb'ers, of said. second couple actuate through continued movement of the press. w

In a multicolor pressfa plurality, of printing couples, each comprising a pair of rotary printing members, normally. inoperathe first couple at a predetermined point in the cycle, independent normally inoperative means for throwing. ofi'impres'sion for. an

other couple, and .timing'jmea'ns 'comprising a latch relay mechanism positively controlled for simultaneouslypositioning apart ofsaid other impression throw-oflf means in .operadetermined sequence in its cycle "by an element ca'rried by oneoffthe printing mem-" bers of said second couple actuated through continued movement of I the press.

:7. In a multicolor .press, a plurality .of'

' printing couples, independent normallyinoperative means for throwing 'oflg impression in each, couple, means for actuating I, said throw-oft means in'one touple,- a normally disconnected timing v mechanism' positively controlled and simultaneously operated by the tripping movement of said last mentioned means for simultaneously positioningapart of the impression throw-off means of the nexttcouple, and means carried by-said next couple 'foi' thereafter actuating its throw-off means, all of said throw-offs. being normally disconnected but sequentially. op-

erable through the continued movement of thepress. 8-. In a multicolor press, ap'lura-lity' of" printing couples,.-independent normally inoperative means for throwing ofi lmpression in each couple, means for actuating said disconnected timing mechanism comprising .alatch relay mechanism positively controlled the tripping-movement of's aid last mentioned means for simultaneously positioninga part of the and "simultaneously operated by throw-effmeans {in one couple, a normally" impression .throw-ofi'-means of the-next couple, and -.means carried by said. next couple for thereafter actuating its throwj-ofi' .mean's,-. all of said. throw-offs being normally disconnected J but sequential-1y operable at.

variably predeterminedl points in .each. cvcle through the" continued movement-"of-the' 7 press.

r a multicolor ofi'set presscomprisingtwo printin' units each composed of a form- 'cylinde'r, a lanketmylinder and animpres-f sion-cylinder, separate normally inoperative cylinder ,-a blanket-cylinder and an .im-pre'smea'ns' for I separating the blanket-cylinder; .jfrom .bothform, and impression-cylinders 'in 1each-'unit,'andfa timing mechanism positively Y 4 controlled.- and simultaneously actuated" by the direct movement of the separating means in" the..:first' unit: to simultaneously place a part-of. the then normally inoperative: sepa v rating means in the second unit in operative, Position;-

' 10; In, a multicolor ofi'set press comprising a two printing units each composed of a'-f orm-' sion-cylin'der, separate normally inoperative means for separating the, blanket-cylinderfrom both form and impression-cylinders in each unit, and atimingn'iechanismpositively "controlled and simultaneously actuated by the direct-movementof the separating-means in] the first unitto simultaneously. place a part of; the then I normally inoperative separating, means in the second unitin operative "position for subsequent actuation through thecontinued rotation of an elementcarrie'd.

by the impression-cylinder of thesecond unit. "offthe 11. Ina multicolor offset press comprising, two printing units each composed of-a formpress.

cylinder,- a ,blank'et cylind'er and an impress on-cylinder, separate normally inoperative means for separating; the blanket-cylinder.

vfrom both form and impression-cylinders in I each unit, and-a timlng "mechanism POSI- tively con-trolledgand simultaneously actuated bythe directmovement of the separating meansin the first unit to simultaneously placea part of the then normallyinoperative separating means inthe second {unit n o'p- 'erative position- .for subsequent actuatlon at a predetermined point through the continued pre'ssiomcylinder of thesecond unit of the press. i i

"- 12. printing couples, separate normally inopera- In: a rn'ulticolor press, a plurality of I rotation of an element carried .by' the im-' t1ve means for throwing oh the impression foreach' couple, and a normally inoperative tumng mechanism comprising a latch relay device controlledand actuated slmultane- 'ous'ly bya direct connection With'the first of said.throvv ofi meansto directly' and si- -multaneously place a part of another; then normally inoperative'thr'oW-off meansfin o erative position.

timing mechanism comprising a latchrelay' device controlled and actuated simultaneously by a direct connection Withthe-first of '13.. In a 'multicolor press, a plurality of printing couples, separate. normally inoperati'vemeans for throwing: oil the impression.

for each couple,'and a normally inoperative saidthrbw-ofl means'to directly. and simultaneou'sly place a part of another then nor-' mally inoperative throw-off means in operative position for subsequent actuation by the continued movement of the press.

-14. In a multicolor press, a: plurality of printing couples, separate normally inopernormally inoperative throw-0E means in operative position for subsequent actuation :ata predetermined-point by thecontinued movement of the press. v

-' 15." II 1-a multicolor press, a plurality of 1 Printing couples, inking mechanisms: there- ,forwith separate means for throwing ofii same, inde'pende'nt' normally inoperative means for separating each couple, and nor-;

' -mally disconnected means controlled vand ,si-'

- means in each 'cou le.

*multaneously positioned by the tripping movement of each separating vmeans for subsequently' actuating the inker-' throw-off :16; In a multico or press, a plurality of printing couples, inking mechanisms there-1 forith separate-means for throwing ofl" same,- 2 independent normally inop'erat-ive means for separating each-.couple,"and means,

directly positioned and positively controlled by the trip ing movement of e'achseparating means or actuating the inker throw-off means in each couple 1n each cycle through the continued movement-of the press.

:17 .-In a multicolor press, aplurality (5r printing couples, inking 'mechanismsjtherc "'forwith separate means for throwing off same means-for separating each couple, and Inieans directly positioned and positively controlled byxthe trippingmovement of each separatmg means foractuatingat variably prede- I printing-couples, inking mechanisms there-- termined' points the inker ithrovv-ofi'; means in each couple.

18. Ina multicolor press, a plurality of for with means for throwing. off same, means I for 'throwingofi impression for the first couindependent' normally. inoperative;

ple, .normallyinoperative means for throwmg ofi impression for anothercoupleplaced in operative position by said first impression throw-off means, and '.m ea'ns controlled and placed in "operative position by said im: pression throw-oil means in each couple for operating its inker throw -ofi'.

- 19', In a multicolor press, a plurality-of printing couples, inking mechanisms theref or with means for throwing off same, means for throwing off impression for the first (2011- I ple, normal inoperative means for throw-c ingofi impression-for another couple placed ln'op'erative position by said first 'impr'ession thro W-offmea'na; and means controlled and placed in operative position by said impression throw-offme'ans in each couple" for -operatmg ts'mker throw-0d at afpredeter- 1 i p nt in the cycle after the. impressio isthrown oflfl. I v

20. In a.multicolor.press,.a. -plurality of printing couples, inkingm'echanisms therefor withmeans' for throwing ofi' sam'e,-means for throwing, oil impression for the first couple, normally inoperat ve means for .throwmg ofi' impression for another couple placed in operative position by said first impression throw-off means, and means controlled and,

placed: in operative position by said impres isi on throw-off I means in each couple for op; erating its inker throw-off at predeter: minedpoint. in the cycle after the impression'isthrownofi' actuated through the continued movement of the press.

, 211111 a multicolor press, a plurality of printing couples, inking mechanisms there for, separateznormally inoperative. means forthrowing off same for each couple, means for trolled and, actuated :by the impression throw-oil of -each couple to set its inker throwing off impression-for each couple hav 'ing a-connection vviththe inker'throwsoil' to set thelatter for operation, and means conthrow-ofi'nieans and the-impression throvv--' Y off for the next couple, in operative position operable through the continued movement of the press to sequentially actuate said :inker throw-oil means and said impression throw- 22. In a multicolor pressfa plurality of printing-couples inkingf mechanisms therefor, separatenormally inoperat ve means for throwing oil same for each couple,'jmeans for throwing olf'impression for each couple having a connection'vvith-theinker throW-ofi' to set the latter for operation, andmeans con-- trolled and directly actuated by the impression throw-off of each couple to set its inker throwoff means and the' impression' throw-j I off for the'next couple, in operative position operable through thecontinued movement of the press: to sequentially actuate said'inker throw-oil? means and said impression throwoil at a predetermined point in the cycle.

' 23.1. a multicolor press, a'plurality of lac printing couples, means for throwing off im-' .pression for each couple, nking mechanisms inoperative therefor, separate normall', means for throwing oif'same or-each couple normally inoperative but placed in operative by one of said throw-off meansto position the impression throw-off 'means a-nd inker p throw-oifin another. couple for actuation by p ablethrough: the continued movement of" the the continued inovemcntof the press.

24. In a multicolor press, a. plurality oi Y printing'coup'les, means for throwingoifimpression for each couple, inking mechanisms therefor, separate normallyinoperative means'for throwing ofl' same for each. conprinting ple-fnormally inoperative but placed' in operative position by its impression throwoff means "when actuated thereafter rto -ber sequentially actuated by the continued movement of the press, and a timing mechanism" comprising a latch relay device controlled land-actuated by one of .said throw-oii means to position the impression throw-offmeans and inker throw-0E in another couple for actuation at predetermined p0l11tS'. 'l)y the next printing couple, and] automatic means continued movement of the press.

25. In a multicolor press, afplurality of printing means for restoringtheimpression,for each I couple and a timing mechanism-1positively controlled and simultaneously actuated bythe impression restoring means for one coucouples, manually-inaugurated ple for automatically positioning in sequence the impression restoring means in another couple by the movement of the press. 7 y

26.- In a multicolor press,- a plurality of couples,

couple-and a timing mechanism positively controlled and "simultaneously actuated" by pression restoring means in anothercouple for predeterminedly subsequent-actuation by thewcontinued-movement of the press.

27. In a multicolor press, a plurality ofv printing couples each comprising a pair of rotary members, independent normally inoperative means for throwing oil and=throwing on the impression for each couple, means for positioning the. impression throw-onmeans' for the first couple, a timing mechanism positively controlled and simultaneously actuated by the tripping movement of the impression throw-on means forthe first couple for automatically-positioning the impression throw-on means in the next printing couple, and means operable through the continued movement of the press-to actuate said several impression throw-ion means in pre- "determined sequencer on the impression for each-couple, means manually-inaugurated means for restoring the impression for each I printing couples feach' comprising a pair ofr rotary members, independent normally in-- operative means for throwing off and throwfor positioning the impression throw-on means for .the first couple, atiming mechani-sm positively;- controlled and simultanethe impression throw-on means for the first in the next printing couple, and means oper press to actuate said several impression .throw-on means in predetermined sequence.

ousl'y actuated by the tripping movement of i I 29. In a 'multicolor press, a plurality of printing coupleseachf comprising a pair of rotarymembers, independent normally in' operative means for throwing oli' and throwior positioning the impression throw-on tively controlled andsimultaneously actuated 'by the tripping -movement-o'f the impres-' sion throW-on means for'the first couple for automaticallyand simultaneously position- I ing the impression throw-0n means .in the operable through the continued movement of '30. In a multicolor press, a plurality of printing couples, separate normally inopera 9 tive means for throwing o'fi and throwing .ing on theimpressionfor each couple, means means for t'he firstcouple, aj-timing-mech anism comprising avlatch relay. device jpo'si on thejimpression for each couple, and a device controlled and simultaneously EtCtIlate'dby said throw-on means for one couple to automatically and simultaneously positiming mechanism comprising a latch relay tionthe impression throw-onmeans for the next couple, both said impress-ion throw-off and throw-on means being thereafter actu- 1 ated in either direction in predetermined sequence in their respective cycles by a mo i' able element ineach couple'operated throughf the continued movement of the press.

31.. A two-color press comprising two printing units each having a pair of-rotary printing members, independent'means for for .each [couple normally inoperative and 1 throwingofi and throwing on the impression disconnected from each other, zindwi'timing 'andldisconnected from each-other; and aIti-m I I mg mechanism positively controlled'fand I simultaneously vactuated by the movements of 'said 'throw-ofi' or throw on means for one couple ineither direction to automatically .pos-ition the throw-offand throw-on means for the next couple, both. said normally I dis; connected means being automatically actu- ,i ted in either directi'on after being positioned through the "continued? movement ;of then-press. I 1 33..-A two-color press comprising'. two] printing units each; having a pair of. rotary in either direction to automatically "position the throwfoif and throw-on means .iorthe next couple ,-bothv said normally disconnected means being automatically I actuated; in

34.}A two-color offset press {comprising vtwo printing units each composed of a form'- cylinder,-a blanket-cylinder and an impres-- either direction in predetermined sequence intheir respective cycles after being posithe press.

tioned"through the continued. movement of e :throWi'ng-offsame, separate normally inop- 'erative means for separating the blanket I zsion-cylindena sheet-transfer-cylinder in cooperative relation with each of the twoim ression-cylinders, the form. cyl1nder in eac nnitbeing arranged substantially at 'right angles to its blanket and impression cylinders to provide a working space. be-

tween the two form-cylinders above the im-j' pression-cylinders 'and transfer-cylinder.

.35.-:A' two-color ofi'set press comprlsing two printin units each composed of a term cylinder, a lanket cylinder and an impression-cyljinder,- a .sheet-.transfer-cylinder in cooperative relation with each of the two impression cylinders all of equal-diameters, a

cylinders in' each 'unlt, a timing mechanism theJ-form' cylinder in each unit being ar-- ranged substantially at right angles to its blanket and, impression cylinders to provide, afworkingspacebetween the two' form cylinders above the impressiomcylinders and transfer-cylinder;

36. A two-color planographic offset press:

comprising two printing-units each composed of a form-cylinder, a blanket-cylinder and an impression cylinder, asheet'transfersyhnd'er in cooperative relation with. each ofi in each unit after of the two impression cylinders the "form-s cylinder in each unit arrangedsubstantially' v at- ,rigl1t angles to its blanket and iinpres- -A' two-colorplanographic offset p'ress comprising two printingl units each composed of a form-cylinder, a blanket-cylinder and'an impressio mcylinder, a sheet'tra'nsfencylinder" ln 'cooperative relation with each of the. twoiinpression cylinders the format right angles to ,itsblanket and impression cylinders with the two; unitsftilted at. ditfer "7O cylinderin each unit arranged substantially ent angles from the base line-of the press to provide :a working space flthev form-cylinder of one unit and-the'formv and-blanket cylin ders of thev otlierlunit above the two impres sion and transfer cylinders.-

38.]A two-colort planographicofisetpress comprising two printing units. eachc0mposed of a form-cylinder,a blanket cylinder and an'impressiiimcyl-inder, inking mocha msmsfor the formv rc yhnders'withmeans for cylinderfroin'both form and impression cyl- "inders in each unit, a timing mechanism con:

trolled and actuated by the separating'means .of the first unit] toplace in operativeposition the separating means of the second unit,

and meansfor operating the inker throwoperative;means for separating the blanket its separating means hasbeenactuated.

39; A. two-color planographic ofi'set press comprising two printing 1 units each; com-. posed of a form-cylinder, a blanket cylinder and an impression -cylinder, inking mechas cylinder from both form and impression controlled and actuated by the separating means of the first Unit to place in operative position the separating. means ofpthesecond unit, -and means for operating the inker throw-ofi' in-each unit 'at-a predetermined point in the cycle after "its separating 

